Combustion-engine



W. C. HURST.

COMBUSTION ENGINE.

APPLICATION mm mun, 1915.

1,344,228. I Patented June 22,1920.

gnoewfoz PATENT OFFICE.

WILLIAM c. nunsr, OF NEW YORK, n. Y.

COMBUSTION-ENGINE.

Specification of Letters Patent. Patented J He 22 1920.

Application filed July 1, 1916. Serial No. 107,073.

To all whom it may concern Be it known that I, WILLIAM C. HURST,

- a citizen of the UnitedStates of. America,

and a resident of borough of Manhattan, city, county, and State of New York, have invented certain new. and useful Improvements in Combustion-Engines, of which the following is a description.

This invention relates to gas engines and particularly to the valve arrangement thereof.

More specifically, my invention comprises the provision in internal combustion engines of inlet and outlet ports and valve means for controlling the same comprising rotative valveelements for the inlet and exhaust ports and unitary rotative means for'controlling said rotative valve elements. In the preferred forms of my invention, the valve elements are of circular contour and mounted on the respective cylinders to afford simplicity in assembling and disassembling and to insure, gas-tight joints under all conditions of operation of the engine. 4

Further features and objects of my invention will be more fully understood from the following description and accompanying drawings, in which- Figure 1 is an end elevation, with part in sectional vertical section of one cyhnder of an engine embodying one form of my invention';

Fig. 2 is a side elevation of the multi-cylinder engine; and

Fig. 3 isa top plan view of Fig. 2, partly broken away to exhibit a horizontal cross section, of one of the valves.

Referring to Fig. 1, the cylinder 1 is provided with the usual piston 2 connected by the crank 3 with the engine shaft 4. The crank case 5 is of the usual construction.

The inlet port 6 and exhaust 7 are shown as oppositely located and positioned at the disposed centrally of the head of the cylinder 1, as indicated.

The inlet 6 of the cylinder 1 communicates with the general inlet passage 11 through the valve arrangement, described each inlet port 7 of the cylinder 1.

more particularly hereinafter. Similarly, the exhaust 7 of the cylinder 1 communicates with the general exhaust passage 12 through a similar valve means. The timing of the valve means is effected by the eccentric 12' oscillating the links 13, 14, respecthe engine shaft, although an additional or timing shaft may be employed to operate the valve means, if desired. In Figs. 2 and 3, a multi-cylinder engine is indicated, specifically showing a four cylinder engine, and operated and controlled similarly to the unicylinder engine indicated in Fig. 1.

Referring particularly to the valve means as shown, the face 16 of the cylinder is preferably machined to provide a substantially fiat main circular surface and beveled at its periphery 17. The circular valve element 18 is machined at its front face to make a nice fit with the main circular face 16, and the periphery ofvalve element 18 is preferably beveled similar to the bevel 17 to form a nice sliding fit therewith to effectually prevent leakage of gas therebetween. The stud 19. of valve element may be mounted on the bracket 20 bolted onto the side of the cylinder head. The spur gear 21 is fixed to the stud 19. The resilient element 22 shown as a coiled spring is placed between the bracket 20 and the fixed collar 23 to thereby force the valve element 18 in position in its seat.

Eachspur gear 21 of the exhaust is rotated by suitable means as by the mutually meshing spur gear 24 mounted on the stud 25 to which is fixed the bevel gear 26 meshing with the bevel gear 27 fixed on the shaft 16. The stud 25 is shown generally in bearings carried by the bracket 28. Each valve element 18 is inclosed within the exterior positioning plate 30, which in the multicylinder form may be a single plate for a plurality of valve elements as indicated in Figs. 2 and 3.

Each valve element is provided with a recess 31, preferably circular, and corresponding in'perimeter to the perimeter of Such recess 31 is located on valve element 18 to provide for registry of such opening 31 with the port 7 of the cylinder in proper time relation in the cycle of the engine. In the multi-cylinder embodiment indicated in Figs. 2 and 3, the respective valve elements 18 are rotated in like directions by the common intermediate gear 24. The positioning plate 30 is also provided with the opening 32 in alinement with the exhaust port 7 and communicating with the passage of the general exhaust means 12 of the multi-cylinder engine.

As will be observed, the present invention greatly simplifies the positioning of the valve parts relative to the engine structure in general and avoids the objection to the constructions of engines heretofore pro posed in which the top and upper side portions are obstructed by operating and controlling parts. The invention also simplifies the inlet general passage 11, doing away with the common manifold of the ordinary engine; similarly in the simplification of the general exhaust passage 12 and the means for supporting and mounting such general inlet passage '11 and general exhaust passage 12 under the sides of the cylinder of the engine.

The inlet valve means and operating and supporting parts correspond similarly to the exhaust valve means and operating and supporting parts, and accordingly do not require specific reference thereto.

If desired, the common inlet passage 11 and exhaust passage 12 may be formed of separable sections joined by the separable joint 33. As indicated by the openings 31 of the respective valves 18 (see Fig. 2), the cylinders are timed in sequence relalation, in the order of the cylinders, enumer' ating from left to right, of the first, third, fourth, second.

It will be clear that other operating means for the valves may be employed and driven from the engine shaft.

The invention simplifies the casting of multiple cylinder units, to provide the ex tended fiat faces 16 with the common fiat portion 34. Such construction affords the provision of the additional cooling space 35, effective in increasing the extent of cooling surface of the cylinder.

My invention is particularly adapted to four cycle explosion engines, or to other types of engines having inlet and exhaust ports controlled independently of the piston per se.

Adjustment of the setting of the time instants of firing, working, etc., of the engine may be made as desired, but I have shown as a useful device therefor, the adjustable connection of the links 13, 14 with the shafts 15, 16 in the form of the slotted crank arms 40.

Whereas I have described my invention by reference to specific forms thereof, it will be clear that many changes and modifies, tions may be made without departing from the invention.

I claim.

1. The combination of a plurality of cylinders each cylinder having a port in a wall thereof, disk valve members respectively provided with openings corresponding to said ports, said disk valve members being otherwise imperforate, common means disposed exteriorly of said valve members for sealing said valve members, a stud fixed to each of said valve members, bracket means fixed exteriorly to said cylinders and supporting said studs, resilient means coacting with said bracket means for sealingsaid valve members respectively, a gear carried by each of said studs and a common gearing shaft for actuating said gears in predetermined time relation.

2. The combination of a plurality of cylinders each cylinder having a port in a wall thereof, the wall portion of each cylinder surrounding said port being substan tially fiat, disk valve members respectively provided with fiat faces and respectively. engaging saidflat portions, each of'sai'd disk valve members being provided with an opening corresponding to the port of its cylinder, said disk valve members being otherwise imperforate, common means dis posed exteriorly of said valve members for sealing said valve members, a stud fixed to each of said valve members, bracket means fixed exteriorly to said cylinders and supporting saidstuds, resilient means coacting with said bracket means for sealing'said valve members respectively, a gear carried by each of said studs and a common gearing shaft for actuating said gears in predetermined time relation.

In testimony whereof I have signed this 

